Rio de Janeiro: Hours before the opening ceremony, the Greek Olympic committee has announced the first positive doping test of the Rio Games.
The committee says an unnamed member of the Olympic team failed a doping test in July in Athens. The Greeks say the athlete has left the Olympic Village.
Dozens of athletes have failed doping tests at the last two Olympics, most caught in recent retests of stored samples. The IOC stores doping samples for 10 years so they can be retested when new methods become available, meaning drug cheats who escaped detection at the time can be caught years later.